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12 papers · 2 filters
Photonic Josephson effect, phase transitions, and chaos in optomechanical systems
Jonas Larson, Mats Horsdal
A photonic analog of the Josephson effect is analyzed for a system formed by a partly transparent mechanical membrane dividing an optical cavity into two halves. Photons tunneling…
How orthogonalities set Kochen-Specker sets
Kate Blanchfield
We look at generalisations of sets of vectors proving the Kochen-Specker theorem in 3 and 4 dimensions. It has been shown that two such sets, although unitarily inequivalent, are p…
Noncommutative geometrical structures of entangled quantum states
Hoshang Heydari
We study the noncommutative geometrical structures of quantum entangled states. We show that the space of a pure entangled state is a noncommutative space. In particular we show th…
Multipartite quantum systems and symplectic toric manifolds
Hoshang Heydari
In this paper we study the geometrical structures of multi-qubit states based on symplectic toric manifolds. After a short review of symplectic toric manifolds, we discuss the spac…
Memory cost of quantum contextuality
Matthias Kleinmann, Otfried Gühne, José R. Portillo +2
The simulation of quantum effects requires certain classical resources, and quantifying them is an important step in order to characterize the difference between quantum and classi…
Ultracold atoms in a cavity mediated double-well system
Jonas Larson, Jani-Petri Martikainen
We study ground-state properties and dynamics of a dilute ultracold atomic gas in a double well potential. The Gaussian barrier separating the two wells derives from the interactio…